Coal-mining machine



(No Model.)

H. 8; YM GOAL MI G MA B. No. 448,829.

Patented Mar. 24, 1891.

' UNITED STATES "PATENT. OFFICE.

HORACE l3. \VYMAN, OF DOVER, NE? HAMPSHIRE.

COAL-MINING MACHINE.

SPECIFICATION forming part of Letters Patent No. 448,829, dated March24, 1891.

Application filed December 26, 1890- Serial No. 3'75,831. (No model.)

To all mil/0122, it may concern.-

Be it known that l, HORACE B. \VYMAN, a citizen of the United States,residing at Dover, in the county of Strafford and State of NewHampshire, have invented certain new and useful Improvements inOoal-Miningllia chines; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe annexed drawings, making a part of this specification, an d'totheletters of reference marked thereon.

Figure l of the drawings represents a longitudinal section of a portionof a drillingmachine embodying my invention; Fig. 2, a transversesection taken on lines y y and z 2, showing two drills and the relationthe drills proper will assume with each other when two or more drillsare used; Fig. 3, a detail View in perspective of one of the scrapers.

The present invention has relation to coalmining machines and that classwhere a number of drills are used and operated by suitable machinery torotate the drills and feed them forward.

It is the object of the invention, therefore, to improve theconstruction of this class of machines, whereby it will be rendered moreeffective and result in the work of drilling more satisfactorily, whichobjects are attained by the construction substantially as shown in thedrawings, and hereinafter described and claimed.

In the accompanying drawings, A represents the drill of any well-knownform and construction, and B the drill-shaft, preferably enlarged, atits outer end, as shown at a, to form a head, to which the drill isconnected in any of the usual ways.

The drill-shaft above described is connected by any suitable means tothe machinery usually employed to impart to the shaft and drill therequired rotary motion while in the act of drilling, and this is socommon in this class of mining-machines that further description of itor any illustration of it in the drawings is considered on tirelyunnecessary.

The drill-shaft B has a saddle-iron C,which rests upon said shaft and isof such shape as to partly inclose the shaft back of the drill drill.

and'extends down below the diameter of the shaft. This saddle-iron hassuitably pivoted or hinged to it at a point below the shaft a pluralityof scrapers D, of any preferred size and shape, but preferablysegmental, as shown in Fig. 3, to take substantially the same curve asthe hole out by the drill, said scrapers being free to swing on theirpivotal or. hinged connections in the path of the drill and not tooneside, as heretofore. The sad dle-iron C, as before mentioned, rests uponthe drill-shaft B and is reoiprocated lengthwise with the shaft by theusual mechanism, and the scrapers being directly below the shaft and onthe same line therewith, the cuttings will be cleaned from the path ofthe When two or more drills are used, they are connected together by asuitable frame, the. front end of the frame being shown at E, Fig. 2 ofthe drawings, the drillshafts passing through holes in the end of theframe, as more clearly shown in Fig. 1. To this frame at its front endis bolted or otherwise suitably connected a shield F to prevent thecoal-dust from falling on the saddle-iron and working in between it andthe drill-shaft.

The entire number of drills used may be connected together in anywell-known and suitable manner that will admit of their being freelyrotated independently of each other.

If preferred, the bar E, which I have designated as the front end of theframe, may be all that would be required to connect the nest of drillstogether, said bar being held in position and steadied by the shield F.

\Vhen two or more drills are used, they are so placed with relation toeach other that the cutting-path of one.drill laps into the cutting-pathof the adjoining drill, as shown in dotted lines, Fig. 2 of thedrawings, thereby removing the partition between the two drills andmaking a continuous mortise in the coal of a length equal to the spaceoccupied by the several drills used.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent, is-

1. The combination, with a drill and shaft thereof, of a' plurality ofswinging scrapers located immediately under said drill-shaft in the pathof the drill and pivoted or hinged to suitable supports, substantiallyas and for the purpose described.

2. The co1nbination,with the drill and shaft thereof, of a saddle-ironextending over the shaft, and a plurality of scrapers pivoted or hingedto the saddle-iron, substantially as and for the purpose specified.

3. In a mining-machine, a plurality of drills, and the shafts thereofsuitably connected together, in combination with saddleirons extendingover the drill-shafts, and scrapers pivoted or hinged thereto, and ashield located over the saddle-iron, substantially as and for thepurpose set forth.

-L. The combination, with a drill and shaft thereof, of a saddle-ironlocated over said shaft, and a plurality of segmental-shaped scraperspivoted or hinged to the saddle-iron, substantially as and for thepurpose described.

In testimony that I claim the above Ihavc hereunto subscribed my name inthe presence of two witnesses.

HORACE B. WYMAN.

Witnesses:

JAMES FOGERTY, A. G. WHITTEMORE.

